EP1435499A2 - Dispositif de séchage pour des produits en vrac - Google Patents

Dispositif de séchage pour des produits en vrac Download PDF

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Publication number
EP1435499A2
EP1435499A2 EP04101201A EP04101201A EP1435499A2 EP 1435499 A2 EP1435499 A2 EP 1435499A2 EP 04101201 A EP04101201 A EP 04101201A EP 04101201 A EP04101201 A EP 04101201A EP 1435499 A2 EP1435499 A2 EP 1435499A2
Authority
EP
European Patent Office
Prior art keywords
drying
dry gas
dry
gas
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04101201A
Other languages
German (de)
English (en)
Inventor
Achim Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel Protec GmbH
Original Assignee
Mann and Hummel Protec GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mann and Hummel Protec GmbH filed Critical Mann and Hummel Protec GmbH
Publication of EP1435499A2 publication Critical patent/EP1435499A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/063—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers for drying granular material in bulk, e.g. grain bins or silos with false floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/30—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/33—Humidity

Definitions

  • the invention relates to a device for drying bulk goods an at least partially funnel-shaped container of the genus Claim 1.
  • the invention according to claim 8 relates to a Drying device for bulk goods, which has a dehumidifier for the Coming use dry grass.
  • Drying devices for drying bulk goods such.
  • B. Plastic granules are known, inter alia, from DE 3234431 C2.
  • the Granules to be dried are in a container that is pointing downwards a granulate removal tapered funnel-shaped and from above with the Granulate is loaded.
  • Dry gas, in particular heated air passed which on the granules adhering moisture entrains.
  • the dry air is passed through a dehumidifier beforehand.
  • the drying devices are generally for a specific one Flow rate of bulk material designed.
  • the plastic granulate is after the Drying supplied in particular plastic processing machines. Before they are often mixed with other components, the one represent a significantly lower percentage in the desired raw material.
  • Conventional dryers are used for the pretreatment of additional granules very small amounts are only of limited use. Will this Problems with the drying result may not be completely filled of the granules occur because the passage of the dry air is no longer in takes place homogeneously.
  • full filling is the Drying device with granules due to the time-dependent thermal degradation of the bulk material is not possible.
  • the drying plant leaves the capacity of the desired amount of dry granules to adjust.
  • the dehumidifier in particular remains when the Drying capacity largely unused because it is in the event of Plant utilization must be designed.
  • For dehumidifying the dry air often come regenerable cartridges with moisture-absorbing Fabrics used as an additional unit for the granule dryers assigned.
  • the object of the invention is to provide a drying device for To create bulk goods that optimally match the to be dried Granulate amount can be adjusted, especially for small dry amounts is suitable, and a high degree of flexibility in use, in particular with regard to different locations.
  • the inventive device for drying bulk goods according to Claim 1 represents a solution to enable its flexible use.
  • the drying device according to the invention has a funnel-shaped Container in which the bulk material to be dried is filled and removed can be. Furthermore, the passage of a dry gas through the Containers possible in such a way that the dry air flows through the bulk material.
  • This device also has a dehumidifier, which in particular can also be structurally integrated into the system unit of the drying container can. This is made possible by providing a membrane dryer Dehumidification of the dry air, as this is compared to the conventional one dehumidifying devices mentioned above by a small space requirement is marked. It is a purge gas connection and a purge gas outlet provided the passage of purge gas through a purge section enable.
  • the rinsing section is turned away from the drying section Side of the membrane formed.
  • the purging gas is therefore the by Moisture penetrating membranes. This creates one Partial pressure difference in humidity between the two sides of the Membrane, whereby the function of the membrane dryer is achieved.
  • a particular embodiment of the invention provides a membrane dryer before, which has two dry gas connections, the passage of the Dry gas through one of moisture-permeable membranes formed drying section allows.
  • the cross section of this drying section is selected in such a way that a Throttling effect is achieved.
  • the passed dry gas relaxes therefore from a higher pressure level in front of the membrane dryer to one lower pressure level after drying.
  • the drying section can e.g. B. from Hollow fiber membrane tubes are formed, such as this. B. from DE 196 33 177 A1 are known. After the dehumidification has taken place, the drying gas becomes Container for drying the bulk material supplied.
  • the purge gas can advantageously the dry air line behind the Membrane dryer can be removed.
  • Condition for successful dehumidification of the Dry gas is that the purge gas flow is smaller than the dry gas flow, so that the drying container has a dry gas flow at all can be put.
  • Throttle device provided, which depends on the required Can be set.
  • this is Output of the dry gas from the container downstream of a filter.
  • This retains particles that the dry gas flows through Bulk goods.
  • the filter thus prevents stress on the Working environment of the dryer due to possible granulate dust.
  • the latter can e.g. B. by providing a cyclone again for the Process can be recovered.
  • a special embodiment of the invention provides that the drying gas Compressed air system and the compressed air line Feed membrane dryer.
  • a dry gas throttle device which is preferably installed in the compressed air line, the required Dry air volume can be set.
  • the dry gas throttle can preferably be designed as a clock valve, which is controlled by time Switch the amount of compressed air reduced, with the open position of the Dry gas throttle body the full pressure of the supply of compressed air Available. This ensures that the optimal pressure drop for drying the drying gas is achieved.
  • the Compressed air must be cleaned before being fed into the membrane dryer.
  • the filter means provided for this can be constructed in two stages. In the Preliminary stage is z. B. cleaning of coarse particles by a paper filter reached, the fine stage mainly serves to de-oil the compressed air.
  • the arrangement with a filter at the dry air outlet of the container and the Extracting the dry air from a compressed air system creates an open one Circulation of the dry gas.
  • the compressed air can also within a closed dry air circuit in the device itself be generated.
  • the dry air after leaving the container Pressure generator fed again to the membrane dryer to go through again.
  • An open circuit has the advantage that Only the heating without reaching the desired dry gas temperatures Additional use of return air coolers for that from the container escaping dry gas is necessary. The lower component effort saves costs and leads to a compact design of the device.
  • the one described Device operated with a controller.
  • the controller can e.g. B. the Signals from a temperature sensor between the heater and tank is attached, a temperature sensor at the dry gas outlet of the Container and a moisture sensor behind the exit of the Evaluate the membrane dryer.
  • About the residual moisture of the dry gas behind the purge air throttle element can be controlled by the membrane dryer, whereby this way the drying container is supplied with dry air of constant residual moisture Can be made available.
  • the temperature sensor behind the heater can be used to control the temperature of the dry gas.
  • the Temperature sensors are still used for a temperature comparison of the Dry gas used before and after passing through the container. hereby a heat balance can be drawn up, from which conclusions can be drawn about the course of the drying process are possible.
  • the control unit can continue with be connected to the outlet opening of the container and the discharge of Arrange dried granules depending on their moisture.
  • the Operation of the device is both in batch mode and in continuous operation conceivable.
  • the device Due to the small size and the simple structure of the different The device can be components in a housing or support frame integrate. The result is an arrangement of small size and small Weight that is flexible in handling. In this way, the The device according to the invention is used in a short time at the respective locations come where the supply of small amounts of granules is desired. Thereby can achieve an optimal degree of utilization of the device, which the Efficiency in daily operation increased.
  • the compressed air variant of the The device is only a compressed air connection and an electrical one Connection for control and heating necessary. Connections this Art are available at most conceivable locations, so none Modifications are necessary for the use of the device.
  • the amount of dry air can be Reduce the dry air throttle element to a minimum. The system is consuming So only as much compressed air as this for the degree of filling necessary is. This contributes to the economic operation of the device according to the invention.
  • the figure 1 can be seen which way the dry air through the Device for drying bulk goods takes.
  • the dry air becomes one Compressed air supply 10 removed and via a compressed air line 11 Membrane dryer 12 supplied.
  • a pre-filter 13 is located in the compressed air line 11 for separating particles and oil separator 14 for separating the in Compressed air located oil.
  • the oiler 14 has one Return line 15, the separated oil to the compressed air system again supplies.
  • a clock valve as a dry gas throttle element 16 in the Compressed air line 11 is provided.
  • the dry gas flows through the Membrane dryer 12 and passes a drying section 17, the tubular membranes 18 is formed. When going through the Drying section, the drying gas releases most of its moisture and is passed into a dry gas line 19, where it contains a moisture sensor 20 happens to determine the residual moisture.
  • a branch of a purge gas line 21 leading to a Purge gas connection 22 leads to the membrane dryer 12.
  • a purge gas throttle 23 a solenoid valve is provided in the purge gas line 21, which the Purge gas flow limited by a purge section 24 of the membrane dryer 12.
  • the purge gas absorbs the moisture passing through the membrane and leaves the membrane dryer 12 through a purge gas outlet 25.
  • Das Dry gas passes through a dry gas heater 26 and one Temperature sensor 27 in the dry gas line 19, to then by a Entrance 28 to be fed to a container 29.
  • the container 29 has adjustable funnel walls 30 and is filled with bulk material 31.
  • the Dry gas flows through the bulk material 31 from the bottom up and is through an outlet 32 passed from the container.
  • the bulk material 31 can by a Feeder 34 can be filled into the container 29 and through an outlet opening 35 can be removed again. Feed 34 and outlet opening 35 are lockable.
  • the container 29 has a double wall 54 through which the dry air alternatively, can be routed via a bypass line 55. You then reached via bushings 56 the entrance 28.
  • a controller 36 is provided for operating the device. about Control lines 37, this control evaluates the signals of the Moisture sensor 20 and the temperature sensors 27. Of this Evaluation is the circuit of the dry air throttle element 16, the Purge air throttle element 23, the dry air heater 26 and the outlet opening 35 dependent. In addition, other sensors such. B. a Level sensor for the bulk material (not shown) can be arranged. The Control also allows the device to be manipulated manually.
  • FIG. 2 shows an embodiment of the funnel-shaped container 29.
  • This provides for a self-contained system, which the feed 34 and the outlet opening 35 for the bulk material and the entrance 28 and the Has outlet 32 for the dry gas.
  • the container has a lid 38, which releases the feed 34 and an adjustment of adjustment sides 39 allowed.
  • the adjustment sides 39 form together with fixed wall parts 40 the surfaces of the funnel-shaped container.
  • a catch bar 41 is attached, with lugs 42 interact on the adjustment sides 39.
  • the intermediate floor 44 has one in the middle Through opening 45 for the bulk material.
  • closing means 46, z. B. a screw connection and the lid removed.
  • the feed 34 of the container Approved.
  • the cover 38 open, the adjustment of the Funnel inclination.
  • the design of the fixed wall parts 40 is clear from FIG.
  • the one of them is arranged obliquely and has two kinks 47, ie it consists of three flat wall parts.
  • the other fixed wall part 40 is designed vertically and has a maintenance opening 50 (see Figure 1) is closed by a maintenance cover 51 are also on the container Fastening bores 52, which integrate the container in one Allow housing or on a frame attached.
  • a Mounting flange 53 With help of a Mounting flange 53, the container z. B. on one Attach plastic injection molding machine, the outlet opening with a not shown inlet of the injection molding machine communicates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Air Transport Of Granular Materials (AREA)
EP04101201A 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac Withdrawn EP1435499A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19850303 1998-10-30
DE19850303A DE19850303A1 (de) 1998-10-30 1998-10-30 Trockenvorrichtung für Schüttgüter
EP99121287A EP0997696B1 (fr) 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99121287A Division EP0997696B1 (fr) 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac

Publications (1)

Publication Number Publication Date
EP1435499A2 true EP1435499A2 (fr) 2004-07-07

Family

ID=7886313

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99121287A Expired - Lifetime EP0997696B1 (fr) 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac
EP04101201A Withdrawn EP1435499A2 (fr) 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP99121287A Expired - Lifetime EP0997696B1 (fr) 1998-10-30 1999-10-26 Dispositif de séchage pour des produits en vrac

Country Status (4)

Country Link
US (1) US6199294B1 (fr)
EP (2) EP0997696B1 (fr)
AT (1) ATE290678T1 (fr)
DE (2) DE19850303A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001268367A1 (en) * 2000-06-16 2002-01-02 Novatec Inc. System, apparatus, and method for reducing moisture content of particulate material
US6655043B1 (en) * 2001-09-21 2003-12-02 Apac Inc. Dryer moisture indicator
US20050050759A1 (en) * 2003-08-11 2005-03-10 Manufacturing And Technology Conversion International, Inc. Efficient and cost-effective biomass drying
FR2862129A1 (fr) * 2003-11-07 2005-05-13 Olivier Kaelbel Procede de sechage de materiaux stockes en vrac ainsi qu'une installation de sechage de tels materiaux
ITVR20040162A1 (it) * 2004-10-19 2005-01-19 Moretto Plastics Automation Srl Deumidificatore ad adsorbimento per granuli di materiale plastico
DK2097148T3 (da) 2006-12-22 2010-10-18 Gea Process Engineering As Fremgangsmåde til styring af et spraytørreapparat ved styring af en indløbsluftstrømningshastighed, og et spraytørreapparat
US8108074B2 (en) * 2008-02-12 2012-01-31 Honeywell International Inc. Apparatus and method for optimizing operation of sugar dryers
IT1401634B1 (it) * 2010-08-03 2013-07-26 Moretto Spa Struttura di tramoggia, impianto di deumidificazione e procedimento di deumidificazione di materiale plastico granulare.
EP3169504B1 (fr) * 2014-07-18 2021-10-27 Société des Produits Nestlé S.A. Appareils de refroidissement de produits
CN115355670B (zh) * 2022-08-10 2023-06-27 云南云之香米业有限公司 一种用于大米加工的速干装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560141A (en) * 1948-06-21 1951-07-10 James F Tipps Means for cooling and drying grain and seed
DE1106251B (de) * 1959-08-08 1961-05-04 Elba Werk Maschinen Gmbh & Co Schuettgutbehaelter, insbesondere Dosiersilo fuer koernige und pulverfoermige Baustoffe
DE1531920A1 (de) * 1967-10-05 1970-01-15 Eisgruber Karl Heinrich Siloanlage
US4159580A (en) * 1977-11-25 1979-07-03 Welch Jr Richard Grain drying bin
DE2757527C3 (de) * 1977-12-23 1981-09-24 Schwäbische Hüttenwerke GmbH, 7080 Aalen Vorrichtung zur Verbesserung des Fließverhaltens von schwerfließendem Schüttgut
FR2449054A2 (fr) * 1979-02-19 1980-09-12 Prunet Achille Dispositif permettant de rendre une enceinte ou cuve autovidante et cuve equipee d'un tel dispositif
DE3009818A1 (de) * 1980-03-14 1981-10-01 Krupp-Koppers Gmbh, 4300 Essen Kuehler fuer die koks-trockenkuehlung
DD154627A1 (de) * 1980-12-22 1982-04-07 Peter Kersten Verstopfungsfreie leiteinrichtung fuer schuettgueter,insbesondere an verladeauslegern von tagebaugrossgeraeten
US4412392A (en) * 1982-06-07 1983-11-01 Keller Richard L Grain drying and storage structure
DE3234431A1 (de) * 1982-09-17 1984-03-22 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff Verfahren und vorrichtung zur abfuehrung von gasen und daempfen aus mit schuettgut gefuelltem trocknungstrichter
US5096302A (en) * 1991-04-24 1992-03-17 Spirex Corporation Plastic feeding device and method
US5210962A (en) * 1991-09-13 1993-05-18 Jones Jr John B Vertical shaft processor
DE9211730U1 (de) * 1992-09-01 1994-01-05 TTW-Thermo-Technik Produktions- und Handelsgesellschaft mbH, 58540 Meinerzhagen Trockenbehälter zur Trocknung von Kunststoffgranulaten
DE4334758A1 (de) * 1993-10-13 1995-04-20 Bibox Mehrweg Verpackungssyst Mehrwegbox
DE4335225C1 (de) * 1993-10-15 1994-09-08 Ambos & Langbein Elektro Elekt Verfahren zum Trocknen und Fördern von Kunststoffgranulat sowie Vorrichtung zur Ausführung des Verfahrens
US5799412A (en) * 1996-04-11 1998-09-01 Mitsui Petrochemical Industries, Ltd. Drying solid polymer apparatus
DE19633177A1 (de) 1996-08-17 1998-02-19 Mann & Hummel Filter Flüssigkeitsfilterelement
US5893218A (en) * 1997-04-15 1999-04-13 Pioneer Hi-Bred International, Inc. Seed dryer with automatic control of temperature air flow direction and rate

Also Published As

Publication number Publication date
DE59911725D1 (de) 2005-04-14
US6199294B1 (en) 2001-03-13
DE19850303A1 (de) 2000-05-04
ATE290678T1 (de) 2005-03-15
EP0997696B1 (fr) 2005-03-09
EP0997696A2 (fr) 2000-05-03
EP0997696A3 (fr) 2001-12-05

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